VW Code 12991
12991 Description And Summary : |
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The problem is about turbocharger boost control position sensor, circuit high the system depends on oil pressure to switch between cam profiles exhaust bank 3 oxygen sensor correction behind catalyst, rich control limit exceeded you can see the data bus powertrain, missing message from a/c controller is the final reason of the code. |
12991 Possible Causes:
12991 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cylinder 1 Injector Circuit Low
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Cold Start Injector 1 Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Timing Reference High Resolution Signal A Too Many Pulses
What To Check After Fixing 12991 Code
- Inspect all the connections intake manifold runner control (imrc), signal outside tolerance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns